Got 40 MPG this time. But a lot of freeway so i can't really count that i suppose. But i haven't seen 40 since it was a 1600. The best as a 1700 so far was 37, and that was with the stock map. Best till today with the custom map has been 34.
Anyways, too many variables since i started checking so i can't be sure. But man was it ever nice to see 40, and i wasn't riding like grandma either. I had consistently been going between a low of 31 and high of 34.